Language/Statements/Local_Variable_Declaration/default_initializer_t01.dart

// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion A local variable declaration of the form var v; is equivalent to
/// var v = null;. If T is a nullable type then a local variable declaration of
/// the form T v; is equivalent to T v = null;
///
/// @description Checks that a variable declaration statements of the form
/// `var id;` and `T id;` are equivalent to a variable declaration of the form
/// `T id = null` if `T` is `var` or refers to a nullable type.
/// @author vasya

import '../../../Utils/expect.dart';

class C {}
abstract class I { }
typedef f();

main() {
  var id;
  Expect.equals(null, id);

  bool? id0;
  Expect.equals(null, id0);

  int? id1;
  Expect.equals(null, id1);

  double? d;
  Expect.equals(null, d);

  String? id2;
  Expect.equals(null, id2);

  Object? id3;
  Expect.equals(null, id3);

  C? id4;
  Expect.equals(null, id4);

  I? id5;
  Expect.equals(null, id5);

  List<double>? id6;
  Expect.equals(null, id6);

  Map<int, String>? id7;
  Expect.equals(null, id7);

  f? id8;
  Expect.equals(null, id8);
}